耐硫化氢腐蚀X80管线钢轧制工艺的模拟优化
Optimizing Rolling Process of Hydrogen Sulfide Corrosion Resistant X80 Pipeline Steel by Thermal Simulation
摘 要
采用热膨胀仪研究了耐硫化氢腐蚀X80管线钢在连续冷却过程中的相变行为, 绘制了其连续冷却转变曲线(CCT曲线); 并且利用热模拟试验机对其轧制工艺进行模拟, 研究了变形温度、冷却速率和卷取温度对试验钢组织和硬度的影响, 得到了较优化的轧制工艺; 最后测试了在优化轧制工艺参数下轧制试验钢的力学性能和抗氢致开裂性能。结果表明: 试验钢的相变温度主要发生在450～780 ℃之间; 随着冷却速率增加, 相变开始温度下降, 并且当冷速为1.76～8.8 ℃·s-1时可以得到以针状铁素体为主的组织; 最佳的轧制工艺参数为变形温度(830±15) ℃、冷却速率15 ℃·s-1、卷取温度为(400±15) ℃; 在此工艺参数下轧制得到的试验钢具有优良的抗氢致开裂性能, 并可以满足API5L标准对X80管线钢强度级别的要求。
耐硫化氢腐蚀
CCT曲线
热模拟
轧制工艺
X80 pipeline steel
hydrogen sulfide corrosion resistance
continuous cooling transformation(CCT) curve
thermal simulation
rolling process
Abstract
Thermal expansion instrument was used to study the phase transition behaviors of hydrogen sulfide corrosion resistant X80 pipeline steel during continuous cooling and continuous cooling transformation (CCT) curves were drawn. Moreover, simulation test for its rolling process was also carried out using thermal simulation test machine. And the effects of deformation temperature, cooling rate and coiling temperature on microstructure and hardness of tested steel were analyzed, and the optimized rolling process parameters were obtained. At last, for the tested steel rolled at optimized rolling process parameters, its mechanical properties and hydrogen induced cracking (HIC) resistance were tested. The results demonstrat that phase change temperature of the tested steel mainly occurred between 450 ℃ and 780 ℃. With the increase of cooling rate, the phase transformation starting temperature was overall declined. In addition, the microstructure was mainly acicular ferrite when the cooling rate was between 1.76 ℃·s-1 and 8.8 ℃·s-1. The optimum rolling process parameters was determined as phase transition temperature, cooling rate and coiling temperature of (830±15) ℃, 15 ℃·s-1 and (400±15) ℃, respectively. The tested steel rolled at the above rolling process parameters had good HIC resistance, and it can meet strength demands of API5L on X80 pipeline steel.
中图分类号 TG142.1 DOI 10.11973/jxgccl201607022
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2015/4/24
修改稿日期 2016/3/28
网络出版日期
作者单位点击查看
备注陈健(1987-), 男, 辽宁铁岭人, 硕士研究生。
引用该论文: CHEN Jian,WANG Bing,LIU Qing-you. Optimizing Rolling Process of Hydrogen Sulfide Corrosion Resistant X80 Pipeline Steel by Thermal Simulation[J]. Materials for mechancial engineering, 2016, 40(7): 102～108
陈健,汪兵,刘清友. 耐硫化氢腐蚀X80管线钢轧制工艺的模拟优化[J]. 机械工程材料, 2016, 40(7): 102～108
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【4】彭海红, 陈晔, 李国宝, 等.X60管线钢再结晶和过冷奥氏体连续冷却相变行为的研究［J］.钢铁钒钛, 2006, 27 (4): 34-37.
【5】左碧强, 王岩, 米振莉, 等.管线钢X80的CCT曲线研究［J］.材料热处理技术, 2010, 39(4): 12-14.
【6】彭海红, 栾玉武, 黄伟, 等.X65管线钢连续冷却相变行为的研究［J］.宽厚板, 2007, 13 (1): 36-38.
【7】DONG C F, LI X G, LIU Z Y, et al. Hydrogen-induced cracking and healing behaviour of X70 steel ［J］. Journal of Alloys and Compounds, 2009, 484: 966-972.
【8】ZHAO Ming-chun, SHAN Yi-ying, XIAO Fu-ren, et al.Investigation on the H2S resistant behaviors of acicular ferrite and ultrafine ferrite［J］. Materials Letters, 2002, 57: 141-145.
【9】KOH S U, JUNG H G, KIM K Y. The effect of microstructure on hydrogen induced cracking resistance of high strength low alloy ［C］//16th International Corrosion Congress. Beijing: ［s.n.］2005: 66.
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【11】GREGG J M, BHADESHI H K D H. Solid-state nucleation of acicular ferrite on minerals added to molten steel［J］.Actamaterialia, 1997, 45: 739-748.
【12】KIM Y M, LEE H, KIM N J. Trans-formation behavior and microstructural characteristics of acicular ferrite in linepipe steels［J］.Materials Science and Engineering A, 2008, 478: 361-370.
【13】TANG Zheng-hua, STUMPF W. The role of molyb-denum additions and prior deformation on acicular ferrite formation in microalloyed Nb-Ti low-carbon line-pipe steels［J］. Materials Characterization, 2008, 59: 717-728.
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【15】顾宝兰, 徐学东, 周莉. 管线用钢显微组织对氢致裂纹影响的研究［J］. 理化检验-物理分册, 2006, 42(1): 8-11.
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【18】胡亮. 耐H2S腐蚀管线钢组织缺陷研究［D］ .昆明: 昆明理工大学, 2014: 5.
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